itwbennett writes: OpenStack is calling shenanigans on companies that call their services OpenStack but aren't truly interoperable. (HP, Rackspace, we're looking at you.) Josh McKenty, CTO of Piston and an OpenStack Foundation board member said that the board has 're-fired up' the interoperability working group, and though he admits it will take some time before the hammer falls, he called out HP and Rackspace as two offenders: 'Neither of their public clouds could be called OpenStack under current interoperability guidelines,' he said. For their part, HP has denied the claims, while Rackspace said in a blog post that it is on track for interoperability by the end of the year.